Lens-holder.



C. F. JENKINS.

LENS HOLDER.

APPLICATION men OCT. n. 1915.

1,258,62 1 Patented Mar. 5, 1918.v

UNITED STATES PATENT OFFICE.

CHARLES FRANCIS JENKINS, OF WASHINGTON, IDISTBICT OF COLUMBIA, ASSIGNOR Tl) THE GRAPHOSCOPE COMPANY, OF WASHINGTON, DISTRICT OF COLUMBIA, A COBPO- LENS-HOLDER,

Application filed oetober 17, 193.8.

To all whom it may concern:

Be it known that ll, CrninL-ns FRANCIS Jnivnms, a citizen of the United States, and resident of V fashington, in the District v of Columbia, have invented certain new and useful Improvements in Lens-Holders, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to devices for holdinglenses or lens members in cushioning non-conducting material and in such manner that the spacing may be quickly varied at will and the held devices may be in stantly clamped or released.

In the accompanying drawings,

Figure l is an end view of the devices.

Fig. 2 is a vertical axial section of the same devices.

In these views, 1 represents a horizontal cylindrical casing having a thick lining 2 of asbestos, or the like, provided with a series of internal, slightl separated circumferential rooves 3. T e casing and lining are divide into upper and lower halves which are hinged together at 4, and normally the upper part is held in closed position by gravity only. In certain of the grooves are placed lens members 5 which are spaced as desired by merely placin each in such groove as may be chosen. e lens members being so spaced, the upper part of the cylinder 1s swun to closed position and each member is thus held by a non-conductin cushion engaging its entire periphery an preventing its contact with metal at any point. The lens members may be shifted or replaced almost instantly since they may be Specification of Letters Patent.

Patented "Mar. 5, 1918.

serial Il'lo. leases.

freely lifted out or dropped into place when the case is opened. Free expansion and conor blows is avoided. Under conditions ordinarily existing in the use of such lenses the breaking of lenses heretofore unfortunately common, is practically eliminated, while change of lenses is greatly facilitated.

/V hat 1 claim is:

1. A lens holder having a lower concave member lined with cushioning, non-conducting material rovided with a series of parallel, groove-like depressions into any of which the peripheral portion of a lens member may be readily passed, and a, similar upper member arranged to move down upon lens members in place in the lower member and similarly hold their upper peripheral portions, substantially as set forth.

2. A lens holder consisting of a cylinder divided into upper and lower portions lined with asbestos, or the like, and provided with a series of circumferential grooves adapted to receive and hold lens members in variously spaced relations.

3. A lens holder consisting of a longitudinally divided tubular structure having u per and lower portions provided with reg1stering grooves in arallel planes, whereby it is adapted to hol a plum ity of lens members in variously spaced relations.

In testimony whereof I hereunto aflix my signature.

CHARLES FRANCIS JENKINS. 

